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Osmosis Internal Assessment - Biology Higher-level

 Essay about Osmosis Interior Assessment -- Biology Higher-level

The result of salinity on osmosis of solanum tuberosum D. (potatoes)| Biology HL Inside Assessment – Year 10

Teresa Nguyen

Table of Contents

1 DESIGN2

1 ) 1 Determining the problem2

FOCUS QUESTION2

HYPOTHESIS2

BACKGROUND INFORMATION2

INVESTIGATION VARIABLES3

1 ) 2 Handling Variables3

TAKE CARE OF THE HANDLED VARIABLES3

CONTROL EXPERIMENT4

1 . 3 Trial and error Method4

MATERIALS4

RISK ASSESSMENT5

METHOD5

2 DATA COLLECTION and PROCESSING7

2 . you Recording Organic data7

QUANTITATIVE RAW DATA7

QUALITATIVE UNCOOKED DATA7

2 . 2 Digesting Raw Data8

Processed Info Table9

a few Conclusions and Evaluation11

3. 1 Conclusion11

CONCLUSION STATEMENT11

CONCLUSION EXPLANATION11

3. two Evaluation Procedures12

RELIABLITY12

LIMITATIONS/WEAKNESSES/ERROR IN LABORATORY INVESTIGATIONS13

3. 3 Bettering the Investigation14

MODIFICATION FOR THE EXPERIMENT14

Bibliography15

Appendixes16

Appendix A – Risk Assessment16

Appendix N – Turnitin Receipt19

Appendix C – Journal19

one particular DESIGN

1 . you Defining the situation

FOCUS QUERY

What is the result of osmosis on the mass (g) of solanum tuberosum L. (potatoes) after duration of 24 hours in varying attentiveness levels (2%, 5%, 10%, 20% and 25%) of sodium chloride (table salt)?

HYPOTHESIS

Solanum tuberosum D. final people will drop as the concentration (2%, 5%, 10%, 20% and 25%) of sodium chloride increases. Spud slices put in distilled drinking water will have bigger mass percentage due to the skin cells becoming turgid.

HISTORY

Durchmischung is the motion of substances from a hypertonic (high concentration solute) to the hypotonic (low focus of solute). There are several types of diffusion among which is osmosis. Osmosis is a movement of water elements through a semipermeable membrane that allows only smaller sized molecules just like water to pass through and prevent greater molecules to such as blood sugar or sodium chloride. (Bozeman Biology, 2012)

Within just osmosis comparison between the several solutions standard terminology are more comfortable with describe right after such as Isotonic, hypertonic and hypotonic as mentioned earlier. Isotonic is if the solution offers equal concentration of solutes. Hypertonic can be when the option has attentiveness of the solute. In contrast, hypotonic is when the solution provides lower focus of the solute. (Bowen, 2002)

Plant cellular material are proven to have good cell walls that when osmosis allows normal water to be taken up it swells. However , in order to avoid the cellular from filled the cells become turgid. The pressure within the cellular rises and gradually the interior pressure has grown to an degree which actually water elements cannot enter into. (Nigel D Purchon, 2012) This is practical for vegetation as they you don't have skeletons, as a result their leaves and stems are supported by the pressure of the drinking water. Loss of drinking water by osmosis causes the plant to become down which the sang membrane withers from the cell wall. (BBC, 2012) EXPLORATION VARIABLES

TABLE 1 – Practical Investigation Factors

Type of Variable| Identified Variable

3rd party | The varied concentration standard of Sodium Chloride (2%, 5%, 10%, twenty percent and 25%). | Dependent | The differentiation of masses of different potato items (final – initial mass) in every single Sodium Chloride concentrations (2%, 5%, 10%, 20% and 25%) following 24 hours. | Controlled| Each trial is usually from the same potato. The quantity of solution given in each trial. The size of spud slices. Way to obtain biological material. Potato bits in unadulterated water. The duration of the investigation. How big is the test pipes. | Out of control | Level of osmosis. The initial salt concentration inside the potato. Enhancements made on room heat. | 1 ) 2 Controlling Variables

TREATMENT OF THE CONTROLLED PARAMETERS

STAND 2: Control Treatment of Adjustable

Control Variables | Treatment

Each trial is from your same spud. | Each trial applied...

Bibliography: LABELLISE BASSE CONSOMMATION. 2012.  BBC - GCSE Bitesize: Osmosis in skin cells. [ONLINE] Offered by: http://www.bbc.co.uk/schools/gcsebitesize/science/add_gateway_pre_2011/greenworld/waterrev2.shtml. [Accessed 01 October 12].

Bowen

Holler, B., 2012. The Effect of Salinity upon Osmosis in Solanum tuberosum (potatoes). Gold Coast: Bianca Holler.

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